From 1d3abd17cc011857e542d42185de49b455afc2d8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jens=20Gr=C3=A4f?= <jgraef@linetco.com>
Date: Fri, 7 Oct 2016 13:42:24 +0200
Subject: [PATCH] dma2d: fix an error in up_dma2dcreatelayer where an invalid
 pointer was returned when a certain underlying function failed.

---
 arch/arm/src/stm32/stm32_dma2d.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/src/stm32/stm32_dma2d.c b/arch/arm/src/stm32/stm32_dma2d.c
index 5e5740e27b..db76245708 100644
--- a/arch/arm/src/stm32/stm32_dma2d.c
+++ b/arch/arm/src/stm32/stm32_dma2d.c
@@ -2069,6 +2069,7 @@ FAR struct dma2d_layer_s *up_dma2dcreatelayer(fb_coord_t width,
               /* free the layer struture */
 
               kmm_free(layer);
+              layer = NULL;
               lcderr("ERROR: ENOMEM, Unable to allocate layer buffer\n");
               errno = ENOMEM;
             }